export nlp (#28)

* export nlp

* enhanced download

Co-authored-by: Jesus Rocha <[email protected]>

Author: JesusGuerrero

.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+	// Use IntelliSense to learn about possible attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Launch Program",
+			"program": "${workspaceFolder}/server.js",
+			"request": "launch",
+			"skipFiles": [
+				"<node_internals>/**"
+			],
+			"type": "node"
+		}
+
+	]
+}

server.js

@@ -141,7 +141,39 @@ app.post('/api/uploadflow', async (req, res) => {
     res.status(500).send({ message: 'File upload failed' });
   }
 });
-
+app.get('/api/download/:workingId', (req, res) => {
+	const { workingId } = req.params;
+	const destinationPath = `${systemTdataFolder}/user-data-in/${workingId}.export-aql`;
+	fs.writeFileSync(destinationPath, "");
+	const resultFileName = `${workingId}.zip`;
+	const file = `${systemTdataFolder}/run-aql-result/${resultFileName}`;
+	const FIFTYSECONDSTIMEOUT = 100;
+	let counter = 0;
+	setInterval( () => {
+		if( counter > FIFTYSECONDSTIMEOUT) {
+			clearInterval(this);
+			return res.status(400).send({ status: '' });
+		}
+
+		if(fs.existsSync(file) ) {
+			var stat = fs.statSync(file);
+
+			let fileContents = fs.createReadStream(file);
+			const fileType = 'application/zip';
+			res.writeHead(200, {
+				'Content-Type': fileType,
+				'Content-Length': stat.size
+			})
+			fileContents.on('close', () => {
+				clearInterval(this);
+				deleteFile(`${systemTdataFolder}/run-aql-result/${resultFileName}`, resultFileName);
+				res.end();
+			})
+			fileContents.pipe(res);
+		}
+		counter += 1;
+	}, 500);
+})
 app.post('/api/run', (req, res) => {
   console.log('executing pipeline');
   const { workingId, payload } = req.body;

src/nlp-visual-editor/nlp-visual-editor.jsx

@@ -322,6 +322,24 @@ class VisualEditor extends React.Component {
           </>
         ),
       },
+	  {
+        action: 'export',
+        tooltip: 'Export',
+        jsx: (
+          <>
+            <Button
+              id={'btn-run'}
+              size="field"
+              kind="ghost"
+			  disabled={this.props.tabularResults === undefined}
+              onClick={() => window.open(`/api/download/${this.props.pipelineId}`)}
+            >
+              Export
+            </Button>
+          </>
+        ),
+      },
+	  
     ];
   };